Visitor Pattern solution: few visitors have same interface but should work with different objects

Question

I have following class diagram (visitor pattern implementation):

Expected result:
1) WiredVisitor should visit only Router and WiredNetworkCard
2)

Answer 1

You could do this for example:

public interface IVisitor {
   public void visit( T card );
}

And then you'd define your visitors as:

public class WiredVisitor implements IVisitor {
...
}


public class WirelessVisitor implements IVisitor {
...
}

This may not be the textbook solution but it's very clean and very readable.